% slitherlink 653 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/653.a.htm
slitherlink
medium-
19 10
...33......22......
2...1.....323.2.23.
2...3..13...32...2.
2.3220.12...2...21.
22..3....23..33..12
111.113.3.2..2.1.2.
.22...313.331222.23
..2..031.2.1.1..3.2
.312...2.1.3332312.
..2....32.........3
